Now I Need a Hearing Aid - 1971 Marshall Super Lead 100W Repair FINALE

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  • Опубліковано 29 вер 2024
  • This is the finale of our early 1970s Marshall Super Lead 100 Model 1959 repair and overhaul. In the previous video, we called the customer to find out how far he wanted to go with servicing it. In this one we'll replace all the caps, all the tubes, and then we'll track down a pesky problem that just didn't want to go away.
    Watch this one first: • Secrets of the Marshal...
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КОМЕНТАРІ • 658

  • @TheGuitologist
    @TheGuitologist  5 років тому +21

    Here's that Max Pro Electronics Lubricant I showed at about 32:55 - amzn.to/2vZ62Y2
    Compare that to the Deoxit: amzn.to/2Qcm0HT
    So far, it seems to be ok stuff. It definitely cleaned the pots and has an oily consistency like the Deoxit fader lube/cleaner. Thanks to whoever that was that suggested it.

    • @larrimos
      @larrimos 5 років тому

      HUH?...WHAT?....no I don’t know where Darth Vader makes his deposits....lol, excellent work Brad, can’t beat a Les Paul through a Marshall.

    • @hyperluminalreality1
      @hyperluminalreality1 5 років тому

      My fave contact cleaner/lube right now. Amazon and Manufacturer page links. www.amazon.com/MG-Chemicals-Contact-Cleaner-Aerosol/dp/B001U3X3PA?th=1 www.mgchemicals.com/products/cleaning-products-for-electronics/cleaners/contact-cleaners/super-contact-cleaner-with-ppe-801b

    • @uplaywithfire7564
      @uplaywithfire7564 5 років тому

      Nice thick crunchy tone! It's a Marshall it gets fucking loud!

    • @HiHello-ku1fl
      @HiHello-ku1fl 5 років тому

      @The Guitologist Are those the stock 500t and 496r that come in les paul classics? Sounds better than stock so I'm guessing you changed the pickups. What are they? What year is your classic it has a nice light burst.

    • @TheGuitologist
      @TheGuitologist  5 років тому +1

      The pickups are not stock, they are "59 PAF Reissues". Killer pickups.

  • @luthiervandros
    @luthiervandros 4 роки тому +70

    Didn’t need reverb on those amps. The reverb from the stadium was perfect.

    • @zfatbcvxbthsbcv
      @zfatbcvxbthsbcv Рік тому +2

      Ive got a couple stadiums lying around, great reverb.

  • @donrutter6765
    @donrutter6765 4 роки тому

    Wow you had your hands full with fixing that one !

  • @An2oine
    @An2oine 5 років тому

    Since watching your channel, I get cool engineering videos. Thanks for the algorithm setup.

  • @SeanKerns
    @SeanKerns 5 років тому +2

    Yes! JJ's. My EL34 of choice for any Marshalloid. Closest I've found to the Mullard sound in new tubes.

    • @mutarerrs
      @mutarerrs 5 років тому +1

      you should try some winged =C= EL34s - they sound awesome to me, especially on high gain. The JJs seem to have a great low end though which is nice for clean.

    • @SeanKerns
      @SeanKerns 5 років тому

      @@mutarerrs I liked the original "Svetlana winged C" for amps like DSL's that are supposed to have a clean. I haven't cared personally for the Reflektor made Svetlanas, and while I did like the later "=C=" tubes, which were made by the original people that did the first Svetlana tubes, they were either out of production or something else happened, that they started going for stupid prices.

    • @mutarerrs
      @mutarerrs 5 років тому

      yes - i have a DSL, great call - and i just paid about $85 each for a matched pair of NOS =C=. The JJs are just fine too but the real magic is in my RCA 12AX7 preamp tubes. Haven't tried any mullards yet - def will at some point.

  • @aquilarossa5191
    @aquilarossa5191 5 років тому

    I have a bunch of parts for building a Marshall clone. I have never done it before but have wanted to for years now since I replaced the OT on my JCM 800 1987 and realized I can understand this stuff and solder etc. Your Boogie video and this one have kind of put me off though. Looks like it can be a complete effing nightmare, but that crunch sound you got was just so legit - so there is a pay off to it. That thing is the quintessential sound of rock to me. Maybe better I build a treble booster pedal instead and then maybe something simpler like a Fender Champ, which will be easier with my messed up spine (all that leaning over the work bench and twisting to get the iron in there would be something I could only do in short bursts).

  • @Dennis-mq6or
    @Dennis-mq6or 3 роки тому

    I am glad to see that you finally figured out that you can't use a 150 volt coupling cap in a 400 volt circuit!
    I don't know what your original problem was, but your subsequent problems were all caused by that white 150 volt coupling cap you installed; either slowly breaking down at idle or instantly breaking down when you played your first note.

    • @TheGuitologist
      @TheGuitologist  3 роки тому

      That was a 630V cap. The 150 was not the voltage designation. It’s a part number or something.

    • @Dennis-mq6or
      @Dennis-mq6or 3 роки тому

      @@TheGuitologist ,
      Then why did you remove it?

    • @TheGuitologist
      @TheGuitologist  3 роки тому

      Because the original cap was not at fault.

    • @Dennis-mq6or
      @Dennis-mq6or 3 роки тому

      @@TheGuitologist
      That makes good sense.
      It just seemed to me, while watching the video, that about the same time the amp started playing very well, that wight cap was back out and the original back in place. Since I mistakenly thought that you had used a 150 volt cap in that spot, it reinforced my (incorrect) thoughts on what the problem was.

  • @LucasFowler
    @LucasFowler 5 років тому

    That's a good little run there at 46:00 mark! Also I could hear that thing from NC.

  • @simonkormendy849
    @simonkormendy849 2 роки тому

    Marshalls usually do tend to be very loud when cranked, mostly because they put-out a lot of midrange frequencies.

  • @tenlittleindians
    @tenlittleindians 5 років тому

    A suggestion for cleaning those tube sockets: Try TV tuner cleaner if they still make it along with that little dental brush you used. Those old mechanical TV tuner dial switches got corroded from use and required a contact cleaner with an abrasive compound to deep clean them. Regular contact relay cleaner does not have the abrasive in it.

  • @kristiandawe85
    @kristiandawe85 5 років тому

    That amp is so cool, so jimi, I would love to hear it with a stratocaster, fuzz, and wah

  • @kayciecarryl3366
    @kayciecarryl3366 4 роки тому +1

    If you want LOUD, try a Marshall Major! 200 watts of ear melting LOUD. And that's on 1. YOWSA!!!

  • @corv1981
    @corv1981 5 років тому +1

    Nice job Amp sound the balls

  • @spartan7404
    @spartan7404 3 роки тому

    Upvoted for song at 39:00

  • @sirbaronvoncount4147
    @sirbaronvoncount4147 5 років тому +1

    That is the sound though. No pedals necessary

  • @memyopinionsche6610
    @memyopinionsche6610 5 років тому

    Yep that's a kind of Marshall stack..
    I remember a behind the music on VH1 about TWISTED SISTER.
    Where JJ French first bought a marshall stack before TWISTED SISTER ever joined together.
    He was just noodling about and neighbors 3 blocks away was bitching he was playing to loud...
    Yep Marshall stacks ushered in birth of heavy metal and hard rock as we know it..

  • @HTEK207
    @HTEK207 Рік тому

    Brad, Hey I think you may know my friends Jeff Faith and his wife Janey. Aside from that I know nothing about working about amps, but I own enough of them that I want to learn a bit. I do have a question about safety and this video brought it to mind. I have always heard that there are elements in the amp that will hold current. Capacitors maybe... Anyhow what are the dangerous elements and how do you make them safe. I assume you have to ground them out somehow is there a good way to do that?

  • @davidkhammer
    @davidkhammer 2 роки тому

    An excellent episode. You are a genius solving these issues. One question. You replaced one of the bias circuit caps from a blue one to a white one. Then when you were using the lubricant it was back to the blue one then later the white one was back then at the end the blue one was back again. I know you turned the chassis around a few times but I kept rewatching and looking. What happened with that capacitor

    • @davidkhammer
      @davidkhammer 2 роки тому

      Oh and I have a 1959hw reissue and yes they are very loud and they really start sounding great when you jumper the channels and turn the volumes up to about 3 o’clock

  • @TonySkiens
    @TonySkiens 5 років тому +1

    It's got his father's eyes !!

  • @nighttrain022
    @nighttrain022 4 роки тому +1

    Brad, if I may ask, as I haven't seen the info mentioned yet, at 26:30+ what is that display on top of your variac that shows voltage, current, power and energy? That seems like something I could benefit from having on my bench too. Is it part of that actual Variac model of yours or an add on you somehow made good use of? Thanks

    • @TheGuitologist
      @TheGuitologist  4 роки тому +2

      Search “pimp my Variac” and you’ll find the video I made on it. There are links in description.

    • @nighttrain022
      @nighttrain022 4 роки тому

      @@TheGuitologist Brad, thank you very much for your fast reply and reference to that "pimp my variac" Just finished watching your Bias Probe build vid. GENIUS Tip. sir.

  • @ddl508
    @ddl508 4 роки тому

    Super Best Amp !!! № 1

  • @TheWarped45
    @TheWarped45 5 років тому

    19:08 the problem is the G1 feeding back +dc into bias

  • @markknoop777
    @markknoop777 3 роки тому

    Seriously geekery. Awesome 😎

  • @markham4041
    @markham4041 5 років тому

    If you think that's loud, you should have been around back then and play through 2, 3 or 4 of them at once. Sure miss that... my ears don't... but I do.
    I used to joke that I knew my volume was right by how many rows back that I could make peoples' hair blow! LOL

  • @ExploitTheVibe369
    @ExploitTheVibe369 4 роки тому

    Nothing like playing a plexi.

  • @johnsimms3957
    @johnsimms3957 5 років тому

    Yeah tubes can be bad brand new. They may get damaged via shipping.

  • @shockwavecity
    @shockwavecity 5 років тому

    Hey Brad, you ever seen the movie Moon? I think you might dig it.

  • @chokkan7
    @chokkan7 5 років тому

    You were a bit unclear, Brad....was it loud? Sorry, but I couldn't hear your response for the amp...'nother great job...

  • @Sloxx701
    @Sloxx701 5 років тому

    Those harbor freight multimeters scare me... lol

  • @RandellVandergriff
    @RandellVandergriff 5 років тому

    I have a old Johnson JT-50 amplifier. I also have tinnitus. Protect you ears.

  • @thomasraustin
    @thomasraustin 5 років тому +82

    Neighbors come and go, but a good ole Black Sabbath riff on a Marshall super lead is forever

    • @TheGuitologist
      @TheGuitologist  5 років тому +21

      And often it's the reason neighbors go. :D

    • @malcolmhardwick4258
      @malcolmhardwick4258 5 років тому

      Probably caused some waves out there in the universe I'm sure ☺

    • @ScottRay77
      @ScottRay77 5 років тому +10

      Man when i was a teenager I would play my Peavy 5150 on our front porch so loud that my granny,who live about a quarter mile away could hear every note.Those were the days.I still occasionally blow out my ears in the bedroom.Combos are good but their is nothing like the sound of a half or full stack

    • @Dragonblaster1
      @Dragonblaster1 4 роки тому +2

      @@TheGuitologist I live in a detached house, a good 70 yards from one neighbour, and the one on the other side is deaf. I have no fear in cranking up my JCM800 4212 in my house, as long as the windows are shut.

    • @briandonovan9560
      @briandonovan9560 3 місяці тому

      That would be a Laney Supergroup...

  • @PooNinja
    @PooNinja 5 років тому +128

    Now you know why Johan Segeborn always has his muffs on in the amp room 😂

    • @DaDaUrka
      @DaDaUrka 5 років тому +14

      You can clearly see the pain in your eyes while playing. :D

    • @PooNinja
      @PooNinja 5 років тому +8

      @@kellyjackson7889 I like to think hes listening to audio books

    • @MalliTrAxxZz
      @MalliTrAxxZz 4 роки тому

      No shit.

    • @Kb-ul8hh
      @Kb-ul8hh 3 роки тому

      Muffs is cheating..

  • @leaharrington4472
    @leaharrington4472 5 років тому +68

    The volume of the amp is visible in your eyes, the way the lower lids come up to protect your delicate eyeballs from the face-melting sound pressure levels. Marshall Watts are louder than normal Watts.

    • @Dragonblaster1
      @Dragonblaster1 5 років тому +5

      Case in point: I have a JCM 800 50W 2 x 12 combo (4212). I used to play in a heavy metal band, and I never, ever had the master volume maxed out. My rhythm guitarist had a, 80W Valvestate hybrid amp, and even turned all the way up, it couldn't compete with my JCM800 with the master on 7.

    • @jurgenwursche5220
      @jurgenwursche5220 5 років тому

      22222222 ES 260, , , , , , , AA

    • @JS-tm1gq
      @JS-tm1gq 4 роки тому +1

      @@Dragonblaster1 I was the valvestate kid in my band :(
      I always maxed the volume and used pedals to boost and it still was never satisfying

    • @donrutter6765
      @donrutter6765 4 роки тому +2

      Ohms law is always ohms law.

    • @regortex3364
      @regortex3364 3 роки тому +2

      I have a Super Lead and a Hiwatt DR-103, the Marshall is like a Fender Champ compared to the Hiwatt. Not that that’s a good thing, it’s just the way it is.

  • @jond63
    @jond63 5 років тому +29

    Jon: BRAD, THANK YOU THANK YOU THANK YOU, SIR...your perseverance and expertise has given my 71 a new lease on life! I can’t wait to get her back....piss off my neighbors...
    Brad: Huh? What? Wha did you say?!?
    Seriously, thank you. I have another job for you, if interested. Your mission, Mr. Phelps, should you decide to take it: a 1980 Marshall Master Lead 100w that was converted to 6CA7s. The bias cannot be set within operational range, it runs too cold. Can you change the tubes back to stock (6550s or EL34s)? This comment will self-destruct in 5 seconds...

    • @TheGuitologist
      @TheGuitologist  5 років тому +4

      I'll message you a bit later with details!

    • @CR3W1SH03S
      @CR3W1SH03S 4 роки тому +1

      5 words... Post Phase Inverter Master Volume. I put one in my home brew 1959 clone. Very playable and still crunchy as hell. I find it better than the 800 style MV. You get to drive the PI harder without melting your face. Less buzzy than the 800. One down side is that the presence control become less effective at lower volumes because of less negative feedback.

  • @UncleDoug
    @UncleDoug 5 років тому +5

    I had a similar problem with a faulty matched tube set in my "Bandmaster from Hell" video. Once AES replaced the faulty tube set, everything worked just fine.....but I have to wonder how the tubes were matched in the first place if at least one of them would not maintain a steady plate current (?)

    • @TheGuitologist
      @TheGuitologist  5 років тому +1

      This is the very first time I've had this issue with an AES matched set. That's why I didn't want to believe it at first. This was a weird issue though... After the socket change, the bias would hold steady...until I put a guitar signal through it, then it would just dive immediately. Weirdest problem.

    • @russellhltn1396
      @russellhltn1396 5 років тому

      @@TheGuitologist Which makes me wonder if it's parasitic oscillation. You got it tamed to the point where it wouldn't start until you hit the right note. Maybe the characteristics of the JJs are different enough to stop that.

    • @Starcrunch72
      @Starcrunch72 5 років тому

      @@russellhltn1396 I ran into a similar situation with parasitic oscillation on a 66 bassman a couple years ago which turned out to be a replacement output transformer to finally fix the problem--it was a weird, old tv shop kind of OT that was in it when dropped off to me.

  • @scottroberts3801
    @scottroberts3801 5 років тому +20

    Always great for another old Marshall to live another day to make more ears bleed. Good jobb..

  • @simonebottino5165
    @simonebottino5165 5 років тому +22

    Hey Brad your belly capacitor is drifting, a lot!

    • @TheGuitologist
      @TheGuitologist  5 років тому +21

      At least it isn't leaky.

    • @stevemitchell2252
      @stevemitchell2252 5 років тому +1

      @@TheGuitologist dude your amazing!!! awsome technician and guitar player... I am totally subscribed and just love your videos keep them rolling!!!

    • @brotherabe
      @brotherabe 5 років тому +2

      Wait till you get older......

  • @stevehogan8829
    @stevehogan8829 5 років тому +10

    Man I really enjoy watching you figure shit out. Not sure why as I have no idea what you're doing but somehow it's enjoyable. Thanks Brad... Great video.

  • @Twobeers1
    @Twobeers1 5 років тому +21

    I had an amp come back to me 4 times. The owner was complaining that it would all of a sudden start crackling. I went over everything, took a heat gun to it, sprayed it with freeze mist. Bump & banged the tubes, banged on the whole amp. Picked it up a few inches & dropped it. Problem would not manifest itself on the bench. The 4th time it came back, I tapped against the tubes with a different screw driver that I usually don't use for audio/video work. I approached one tube in particular with this screw driver I could get the amp to cut out, just in one spot. This screw driver was magnetized. It was a broken spot weld somewhere inside the tube.

  • @MreViewer
    @MreViewer 5 років тому +8

    Around 1980 I sold my 1971 Hiwatt100 and bought a 1968 100W 'plexi' Super Lead , holy shit that was the loudest amp I ever heard, too loud for most of the gigs I was doing at the time, people in the audience would duck when I keranged an E! happy days...

  • @SeanKerns
    @SeanKerns 5 років тому +11

    I'm literally on the edge of my seat with this bias mystery.

  • @OTCinsane
    @OTCinsane 5 років тому +10

    I subbed because you installed the wrong "tone" batteries on Will's grandfather's amp.

  • @t-boog2173
    @t-boog2173 4 роки тому +4

    I was born in '71 and my dream is to own a '71 Marshall head. I'd be stoked to own this amp.

  • @PrinceWesterburg
    @PrinceWesterburg 5 років тому +7

    I have a 1971 Super Bass Head with the lead mod switch done by Marshall. Its essentially the same amp but mine has bakelite sockets.
    Funny story: In 1971 the original owner played it in the shop for an hour, go it home, played it for 5 mins and his wife ordered it out of the house. In the following week, he got promoted at work, his band split up and his wife discovered she was pregnant! So in 1986 he sold it to us for £99. Back when rack gear was all the rage, none wanted big heads like this.

  • @abelincoln95
    @abelincoln95 5 років тому +7

    Brad puts "hearing aid" in title, ad-sense plays "hearing aid" commercial. Algorithm does it job. And, strategic blockage of sticker is epic! Rather, "Epi ho"!!!

  • @KlemmyConQueso
    @KlemmyConQueso 5 років тому +6

    Those things are pointlessly loud!! I would use as a bass amp maybe.

  • @timidater4803
    @timidater4803 5 років тому +12

    Love your vids!!! Please do one on safely discharging caps!!! Rock on Brother!!!

    • @burtsgurt
      @burtsgurt 5 років тому

      Timidater Absolutely this!

    • @Sloxx701
      @Sloxx701 5 років тому

      The easiest way to discharge them safely is to use a multimeter with a low impedance mode (LowZ). Just put one probe on each terminal and it will drain off in just a few seconds, but you are limited by whatever max voltage the meter can handle. Another alternative is to build a "dead man's stick", see here - ua-cam.com/video/gLDCV-n1BDw/v-deo.html

  • @monkeyboy4746
    @monkeyboy4746 5 років тому +9

    YT is playing hearing aid ads on this video.

    • @TheGuitologist
      @TheGuitologist  5 років тому +2

      monkeyboy4746 man, I hope you're not kidding.

  • @FrankAndTinaOfficial
    @FrankAndTinaOfficial 5 років тому +5

    I had one of those!! Sweet!! Wish I had mine back lol!

  • @daw162
    @daw162 5 років тому +5

    That amp has gorgeous cleans. And I'm sure it has plenty of headroom, too.
    Only issue is that they are so even across dynamics that you just can't hear how loud they are through computer speakers. Same for mesas. If you can turn a 50 watt mesa amp way up and sit in front of it, you're a real man.
    A deaf one. A real deaf one!

    • @TheGuitologist
      @TheGuitologist  5 років тому +3

      Yeah, there's just no way to really impart how loud amps are in a video. The compression and cascaded gains on the mixer make it seem actually quiet. But seriously, I was cringing the entire time sitting beside this thing, even doing the clean sections.

    • @seanhuntley6722
      @seanhuntley6722 5 років тому +2

      What?

    • @toneyisaiah408
      @toneyisaiah408 5 років тому

      Ear plugs are gonna come
      in handy.

  • @hrosemd
    @hrosemd 5 років тому +7

    If you modify the variable resonance inhibitor before you decontaminate the matter/antimatter housing, the multidimensional assembly could be irreparably damaged. Be careful.

    • @therugburnz
      @therugburnz 5 років тому +2

      Duh

    • @TheGuitologist
      @TheGuitologist  5 років тому +4

      Yes, but when you consider the Miller resistance on the photostatic magnameter, the superheterodyne flux would not be an issue.

    • @therugburnz
      @therugburnz 5 років тому +1

      @@TheGuitologist but only when the contrafibularity of the acoustic chamber is balanced in micro mhos.
      Sorry, my Metric System is confounded by System International. Gawd grade school in KY got to brain. He'p me jebus

    • @hrosemd
      @hrosemd 5 років тому

      @@TheGuitologist Holy Cow I didn't even think of that! Yikes, that would have been embarrassing.

    • @JBiggsNewJersey
      @JBiggsNewJersey 5 років тому +1

      Don't cross the streams. It would be bad.

  • @payday1963
    @payday1963 5 років тому +5

    Now this is the reason I watch your channel. A diagnostic dilemma that finally gets resolved and then the rockin' demo. This and SPF are the foundations of your channel for me. Thanks Brad!!!

  • @spacefx1340
    @spacefx1340 5 років тому +5

    Your face at the end, those sound waves crushing your brain...

  • @hyperluminalreality1
    @hyperluminalreality1 5 років тому +4

    I recapped and went through a 1970 metal face Marshall Major for my friend and we played it through both cabinets with gun muffs on to try it out. I remember that it had 600v B+. Cute woven asbestos keeper hats for the KT88s too. It was rural so nobody could hear it. Physical air movement that vibrated your entire skeletal structure. I went outside while he was playing and his windows rattled violently on resonant notes. His little house took a beating THAT night. I am surprised that Ritchie Blackmore is not deaf from humping his Marshall Major all those nights while it fed back in his face....

    • @TheGuitologist
      @TheGuitologist  5 років тому +2

      I honestly can't imagine. It's like grabbing the reigns of a wild stallion and holding on for dear life.

    • @ApeShift
      @ApeShift 3 роки тому

      What's even more insane, is that Blackmore had his Majors modded to have an additional pair of output tubes. So yeah, you want to talk about bone rattling sound pressure levels lol

  • @chriskethan5952
    @chriskethan5952 5 років тому +6

    Thats's the sound of Rock and Roll right there. Get sum, Brad

  • @maxpuppy96
    @maxpuppy96 5 років тому +3

    That was thee coveted amp of its time we were in awe of it as teenagers in the 70's

  • @huorfefalas
    @huorfefalas 4 роки тому +3

    I've zero experience about those capacitors or smt and ain't planning to buy or repair that kind of amp but I've watched every second of it like it was some kind of magic. Thank you!

  • @8toesleft
    @8toesleft 5 років тому +3

    The T-REX of TONE, imitated ,but NEVER DUPLICATED, GOD BLESS OL' JIM MARSHALL.

  • @paulj0557tonehead
    @paulj0557tonehead 5 років тому +3

    @The Guitologist
    Shoulda' thrown a PHASE INVERTER MASTER VOLUME on it! No British amp crunches as well without one- at all volumes. A 2 capacitor, 1 duel potentiometer investment...mount on the back of amp in existing hole or no biggie drilling a new one back there, it's a desirable upgrade, in ANY era.

    • @boss351gt6
      @boss351gt6 5 років тому

      Agree. Good quality wire wound PEC dual gang pot are worth every dollar for a great PPIMV.

    • @bobolsen8067
      @bobolsen8067 4 роки тому +1

      No master volume is an”upgrade”ever it takes away a lot of the headroom.

  • @roncarter2188
    @roncarter2188 5 років тому +2

    I want a Marshall to give me that look on my face of, oh crap I can't contain myself and lookout here comes an amp-gasim. Good job!

  • @blakjack3053
    @blakjack3053 5 років тому +1

    Great vid. I own the JMP model 2203 head. The one thing about those old Marshall amps that sucks is they only sound fucking miraculous when they're turned up around 12 o'clock or beyond on the master, but by that point they are just too goddam loud for almost all gigs! Very sad!

  • @kayciecarryl3366
    @kayciecarryl3366 5 років тому +1

    You think that's loud, plug into a Marshall Major (200 watt). It is SO LOUD it'll rattle your teeth at 1, or less!!! I take that back. It's too loud just turning it on!! And it weighs about a ton 😊.

  • @jutukka
    @jutukka 5 років тому +2

    Nice video again! (Well, perhaps a bit too thrilling to a person with a weak heart. 😀) Anyways, "All's Well That Ends Well".
    But I am still curious about those Siemens EL34s. Did you test them (emission etc.) to make sure that they really were toast or was the sockets the real problem? Because IMHO those Siemens EL34 were good quality tubes in those days.

    • @TheDogPa
      @TheDogPa 5 років тому

      Sad tubes compared to the 'real' ones it had. A Rolls with budget import tires. He probably spends more on a good dinner than those new 'tubes' cost.

  • @hughes2397
    @hughes2397 5 років тому +1

    That's the whole idea of the Super Lead! It's supposed to be loud and proud! In my opinion, the Super Lead is the greatest sounding guitar rig ever made. They are loud though! That's why in the movie Spinal Tap they jokingly said that "these amps go to 11!"

  • @dustinschilling862
    @dustinschilling862 5 років тому +4

    Dammmnnn that Marshall tone is timeless. Awesome repair on a kickass amp.

  • @toddflowers8052
    @toddflowers8052 5 років тому +6

    Huh ? What ? ;-) Nice work Brad !

  • @philipdecatanzaro1822
    @philipdecatanzaro1822 5 років тому +3

    I'm glad you have some Gibson sounds going. Like the Tele too. The Marshall sounds really great. Fantastic work.

  • @patrickkeenan6331
    @patrickkeenan6331 5 років тому +2

    Can't BELIEVE you're still trying to repair stuff after you RUINED Will's Easy Guitar's amp....that Danelectro was a GREAT vintage amp, and you messed it up. Shame.
    Seriously, great job on this amp!

  • @semajdis
    @semajdis 5 років тому +4

    Those things are loud enough to strip wallpaper when played in a small room. You may want to grab a long coily cable and play your guitar out on your porch for the sake of your hearing next time :)

    • @imannonymous7707
      @imannonymous7707 5 років тому +2

      Ya thats what i do with my marshall and my ac30 at home i put it out in the hallway

    • @chrisoman2195
      @chrisoman2195 5 років тому

      semajdis probably still fukin loud from there

  • @davedoucette1256
    @davedoucette1256 5 років тому +1

    Damnit Jannet, you have a tube tester!!! Why didn’t you use either one of them. Much love though Brad. This is by and far my favorite channel to watch, thank you for all you do. But use the gosh dang tube tester!!!!

  • @SeanKerns
    @SeanKerns 5 років тому +1

    If you add a condensor mic about a foot back and up, and blend them, you will get just a huge sound. Also, go Cubs!

  • @davidausterman5915
    @davidausterman5915 5 років тому +1

    I was pre-guessing the problem would follow the tubes. They just aren't made like they were in the old days. But then...

  • @nomoniker7917
    @nomoniker7917 8 місяців тому +1

    So damn interesting & enjoyable to watch. Very satisfying ending on top of it all.

  • @michaeladamcaira9174
    @michaeladamcaira9174 5 років тому +2

    Hey Brad,I was just watching Will's easy guitar,and he is tearing into you about his Honeywell amp you fixed,I think it sounds great for what it is,but he is really being tough on you

    • @benvermeulen1915
      @benvermeulen1915 5 років тому +1

      I dunno who this guy Will is but.. I can make the drive down from Michigan and give him a friendly knock.

  • @phonicwheel933
    @phonicwheel933 4 роки тому +2

    Interesting video Brad. As has been said, the symptoms would seem to indicate parasitic oscillations. Presumably, the 5.6K grid stoppers are fitted underneath the tag board. It is best to mount one end of the grid stopper resistor (non inductive type) directly to the tube grid pin on the valve base, using a resistor self-lead as short as possible. Also, it is best to use one grid stopper per tube. (sometimes Marshall fitted one grid stopper shared between two in-phase tubes). (England)

  • @jamesprice6381
    @jamesprice6381 5 років тому +1

    had HORRIBLE LUCK w/MULLARD REISSUES, JJs fixed it all.....2 amps in a row at that

    • @Starcrunch72
      @Starcrunch72 5 років тому +1

      That is good info, was wondering if they were going to be worth the try, thanks.

  • @embreesmith7613
    @embreesmith7613 Рік тому +1

    My 71 jmp measured at 160 watts when driven hard
    My right ear shows that. 🙄

  • @tubical71
    @tubical71 5 років тому +1

    100Watts are 100Watts, if it´s already too much, or still not enough...is defined by the speakers...if you put 100Watts into a speaker with can handle it and has a sensitivity of 100dB/W/m @ 1Watt you end up with 120dB SPL.
    If you put 100Watts to a speaker which has a sensitivity of only 80dB/W/m @1Watt you end up with 100 dB SPL, which is just enough for a jazz combo...
    In my case, with a rotary speaker system and a hammond organ, i need much much more "uumph" to get things going...i have a laney Super-PA which does about 120Watts, and i can barely compete with a Twin-Reverb at full blast...so i needed something different...i x-changed the stock 12inch woofer with a BMS type which can handle about 800Watts AES continues and i also changed the horn driver to the JBL which has a extended low end (Fu=500Hz) and can handle about 120Watts or 900Watts above 800Hz with 12dB/oct lo-cut.
    I designed a six-times 6C33C power triode PushPull Amp which does around 400Watts...and with this Amp i can easily compete with two marshall full stacks....that´s how things work....100Watts aren´t loud....;)

    • @Starcrunch72
      @Starcrunch72 5 років тому +1

      Efficiency is key, you're absolutely right

  • @AlejandroLapeyre
    @AlejandroLapeyre 4 роки тому +1

    So you decided to put back the blue cap there 40:45 I guess for simmetry ? 😀

  • @kevinshea4776
    @kevinshea4776 5 років тому +1

    Great video series on this Marshall Super lead repair. You are a true problem solver! (I did not see the Mesa Boogie series you refereed to but in past videos I have heard you talk about it.)

  • @mikemartin6554
    @mikemartin6554 5 років тому +2

    awesome! I've been waiting for this 2nd video! The 1st one was really cool. And "Rob Roy"! Great movie! Looking forward to more "nerdish" fun with your videos!

  • @donaldfilbert4832
    @donaldfilbert4832 5 років тому +1

    Following your logic - it all seems to make sense. Except - when you first swapped the new tube sets - the PROBLEM FOLLOWED THE TUBES?
    So - how does that make sense - that you then decided it was the tube sockets??

    • @TheGuitologist
      @TheGuitologist  5 років тому

      Because I changed tubes after that and the problem remained, but back to the other side.

  • @rickm1041
    @rickm1041 5 років тому +1

    Hi Brad, Great video I learned a lot...Your trouble shooting was excellent. Would you mind telling me where your located?
    I have a 1968 Marshall Super Tremolo 100 Plexi that keeps blowing fuses. Thanks

    • @TheGuitologist
      @TheGuitologist  5 років тому

      I'm in Louisville, KY.
      bradlinzy at gmail

  • @SeanKerns
    @SeanKerns 5 років тому +1

    Hey, something I've wondered, and don't see a link for in your "Stuff I use" section. What's the little display that sits on your variac that shows power consumption? Is it hooked directly into the variac?

    • @TheGuitologist
      @TheGuitologist  5 років тому

      Digital LCD Voltmeter Ammeter: amzn.to/2pct7kd

  • @kennethhughmusic
    @kennethhughmusic 3 роки тому +1

    Man, I can see the pain in your face with how loud that amp is. Way to stick it out :)

  • @jamesthe-doctor8981
    @jamesthe-doctor8981 5 років тому +4

    Man, does this one ever take me back! My first Air Force assignment in the ATC Radar career field was to Hurlburt Field, with an ancient, 50s-era MPN-13 all-tube radar set. Troubleshooting went more or less exactly like this, with the occasional tube socket replacement. Most of us dreaded those, as every pin had any number of components wired and directly connected to them. I miss that job.

    • @TheGuitologist
      @TheGuitologist  5 років тому +2

      James TheDoctor Duncan sounds like fun, actually.

    • @jamesthe-doctor8981
      @jamesthe-doctor8981 5 років тому

      It was, mostly. The only time it wasn't fun was when your radar was off the air with a very hard to chase down trouble. It was an air traffic control radar, and when it goes down, you have to send a NOTAM (Notice To Airmen) to the FAA, and then everybody in the chain of command is breathing down your neck. Heh, they seem to forget that spending all your time on the phone prevents repair LoL. But yeah, mostly it was great fun, which is why I miss it. All of the mobile radars went to Desert Storm and probably never came back. That's sad.

    • @leejamestheliar2085
      @leejamestheliar2085 5 років тому +1

      I was a squid ( navy) Et ( extra testicles) I miss all of the really great old tube stuff.
      [ sniff] thx for your service.
      Millions of watts, what could go wrong??????

    • @jamesthe-doctor8981
      @jamesthe-doctor8981 5 років тому

      Lee James thanks for YOUR service, man. My trainer right out of tech school was former Navy, and he's the reason I became the technician I did. IDK about now, but back in his day they didn't teach sailors different types of electronic systems, like radar, radio, AC&W, ILS, etc. They just taught them electronics, and when you got to your ship, you studied the theory of operation of whatever was broken, and fixed it. I feel like others got cheated, and I lucked out.

    • @leejamestheliar2085
      @leejamestheliar2085 5 років тому +1

      @@jamesthe-doctor8981 we were actually called " everything " techs. Almost went blind going through the school ,physics and math and theory 50% of grade based on labs....real radars and radio equipment. About a year of hell, messed with you any way they could. To make sure you could handle anything that might come your way on board the ship.
      After the school, you KNEW you could handle anything!!!
      Did it for about a decade then, got out. WHAT A RIDE!

  • @BigTrouble324
    @BigTrouble324 Рік тому +1

    I just had to watch the end of this again at 43:00. Epic moment Brad!

  • @MikeyMack303
    @MikeyMack303 5 років тому +1

    Great job! There is NOTHING like the sound and feel of a well tuned vintage Marshall tube amp!!! P.S., I have had very good results using the tiny airbrush cleaning brushes ( found at that store where you got the heat shrink tubing) for cleaning small openings, like those tube sockets!

  • @leeswindle7790
    @leeswindle7790 5 років тому +1

    Aww...come on and put the patch cable between the 2 channels. I've got a 1972 and that's how I used to run it. Finally got to where we had to face the cabs to the wall to keep the high end from killing us. Still clear as a bell facing the wall...a huge fricking bell !!!

  • @DeadKoby
    @DeadKoby 5 років тому +2

    Ahem... DeadKoby is a MaxPro dealer.... and I use a ton of it on our shop's projects.

    • @TheGuitologist
      @TheGuitologist  5 років тому

      Maybe that was yu who recommended it then? I like it so far.

  • @audiotechlabs4650
    @audiotechlabs4650 5 років тому +2

    My 50 watt Lead Series can not be turned up more than 3, on the preamp vol. with the Master vol. at 10! Can not imagine how loud this amp is! Great service on this one Brad! You always deliver! Thanxz

    • @Dragonblaster1
      @Dragonblaster1 5 років тому

      Audio Tech Labs I have one too (a 50W 2 x 12 JCM800 4212 combo), and I routinely have the preamp on 11, it's the master volume I can't turn past 5 without risking blowing the windows and my eardrums out.

  • @paulcargo4233
    @paulcargo4233 5 років тому +2

    Apparently people love Marshall vids, nice job Brad

  • @sanelimsirovic2039
    @sanelimsirovic2039 5 років тому +1

    I never put new tube before I check negative bias and make everything working correctly I never test negative bias whit new tube something it can happen only one time and tube cocked for good

  • @Mooncalf2012
    @Mooncalf2012 5 років тому +1

    An even more amazing accomplishment is how you've been able to keep that vintage McDonald's collectible drinking glass in one piece all these years. 22:27

  • @KB_Joys
    @KB_Joys 5 років тому +1

    Did i spy an 820k plate resistor on the phase inverter?

  • @livekaos
    @livekaos 5 років тому +5

    It goes to 11! It’s 1 louder!!!

    • @malcolmhardwick4258
      @malcolmhardwick4258 5 років тому +1

      LiveKaoss 10% louder ☺

    • @livekaos
      @livekaos 5 років тому

      Malcolm Hardwick ua-cam.com/video/_sRhuh8Aphc/v-deo.html it’s 1 louder man!

  • @rockindavebyron3960
    @rockindavebyron3960 5 років тому

    I use to have a 2×12 version of this same amp( Super Lead 100) back in 1982/83? Bought it used for$550, then I traded for a Peavey Special 130( wish I didn't do that !!! Love the Cubs shirt( being originally from Chicago, now living in N Ft Myers Florida). Great video bro!!!

  • @sizzorfitestudio5241
    @sizzorfitestudio5241 5 років тому +1

    Love your videos.. Your video on the door stop foot switch inspired me to make a fuzz pedal built inside a door stop.. :-) After making it, I have to say, It looks and sounds killer.. I used the bazz fuzz circuit. \0/

  • @EdgarsLS
    @EdgarsLS 3 роки тому +1

    my ears are ringing just from watching the video

  • @allendickeson442
    @allendickeson442 3 роки тому +1

    I got my first native sons strap already ordered another one